to drive down a very cold system starting wednesday night into thursday. today, though, sunnyside up looks good. it will be slightly warm. then it's tougher. upper 50s in the fog. i think low to mid-60s. temperatures, they top out today and they will go way down thursday and friday. we'll go from the 60s to the upper 40s and low 50s. morning fog, but then sunny, warmer. temperatures above average but then a much colder. not a lot of rain if any with this system. if there's enough moisture, snow level could get down to 1500, 2,000 feet. but i think cold and windy is the two main systems. 60s for some. 50s for others. fairfield, 57. 62 petaluma, santa rosa, 63. stinson probably will be nice along with much of the coast. 56 antioch. 59 concord. martinez, pleasant hill. 62, berkeley, alameda, oakland looks nice. mid-60s here. santa cruz, capitola should be great. even on the coast. half moon bay, pacifica daly city. atherton, redwood city all in there and san core lows. fog will be on -- san carlos. fog will be on the increase. very cold mornings i don't think there will be a lot of moisture.